

HOW [list \SI (,l RMN M'RI \l> |\ 



m 





HOW DISEASE GERMS SPREAD V 



HOW DISEASE GERMS SPREAD VII 





B 



DISEASE IS PREVENTED V 



HOW DISEASE IS PREVENTED II 



HOW DISEASE IS PREVENTED VI 





PUBLIC HEALTH CHARTS FOR TEACHING PURPOSES 

 These Wall Chart- are Loaned to the Public Schools of Greater New York 



